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// Copyright 2013 the V8 project authors. All rights reserved.
// Rrdistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Rrdistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Rrdistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following
// disclaimer in the documentation and/or other materials provided
// with the distribution.
// * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived
// from this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#include <stdlib.h>
#include "src/v8.h"
#include "src/arm64/macro-assembler-arm64-inl.h"
#include "src/base/platform/platform.h"
#include "src/code-stubs.h"
#include "src/heap/factory.h"
#include "src/macro-assembler.h"
#include "src/simulator.h"
#include "test/cctest/cctest.h"
#include "test/cctest/test-code-stubs.h"
namespace v8 {
namespace internal {
#define __ masm.
ConvertDToIFunc MakeConvertDToIFuncTrampoline(Isolate* isolate,
Register destination_reg) {
HandleScope handles(isolate);
size_t allocated;
byte* buffer =
AllocateAssemblerBuffer(&allocated, 4 * Assembler::kMinimalBufferSize);
MacroAssembler masm(isolate, buffer, static_cast<int>(allocated),
v8::internal::CodeObjectRequired::kYes);
Handle<Code> code = BUILTIN_CODE(isolate, DoubleToI);
Address start = code->InstructionStart();
__ PushCalleeSavedRegisters();
MacroAssembler::PushPopQueue queue(&masm);
// Save registers make sure they don't get clobbered.
int source_reg_offset = kDoubleSize;
int reg_num = 0;
for (; reg_num < Register::kNumRegisters; ++reg_num) {
if (RegisterConfiguration::Default()->IsAllocatableGeneralCode(reg_num)) {
Register reg = Register::from_code(reg_num);
queue.Queue(reg);
source_reg_offset += kPointerSize;
}
}
// Push the double argument. We push a second copy to maintain sp alignment.
queue.Queue(d0);
queue.Queue(d0);
queue.PushQueued();
// Call through to the actual stub.
__ IndirectCall(start, RelocInfo::CODE_TARGET);
__ Peek(destination_reg, 0);
__ Drop(2, kDoubleSize);
// Make sure no registers have been unexpectedly clobbered.
{
const RegisterConfiguration* config(RegisterConfiguration::Default());
int allocatable_register_count =
config->num_allocatable_general_registers();
UseScratchRegisterScope temps(&masm);
Register temp0 = temps.AcquireX();
Register temp1 = temps.AcquireX();
for (int i = allocatable_register_count - 1; i > 0; i -= 2) {
int code0 = config->GetAllocatableGeneralCode(i);
int code1 = config->GetAllocatableGeneralCode(i - 1);
Register reg0 = Register::from_code(code0);
Register reg1 = Register::from_code(code1);
__ Pop(temp0, temp1);
if (!reg0.is(destination_reg)) {
__ Cmp(reg0, temp0);
__ Assert(eq, AbortReason::kRegisterWasClobbered);
}
if (!reg1.is(destination_reg)) {
__ Cmp(reg1, temp1);
__ Assert(eq, AbortReason::kRegisterWasClobbered);
}
}
if (allocatable_register_count % 2 != 0) {
int code = config->GetAllocatableGeneralCode(0);
Register reg = Register::from_code(code);
__ Pop(temp0, xzr);
if (!reg.is(destination_reg)) {
__ Cmp(reg, temp0);
__ Assert(eq, AbortReason::kRegisterWasClobbered);
}
}
}
if (!destination_reg.is(x0))
__ Mov(x0, destination_reg);
// Restore callee save registers.
__ PopCalleeSavedRegisters();
__ Ret();
CodeDesc desc;
masm.GetCode(isolate, &desc);
MakeAssemblerBufferExecutable(buffer, allocated);
Assembler::FlushICache(buffer, allocated);
return (reinterpret_cast<ConvertDToIFunc>(
reinterpret_cast<intptr_t>(buffer)));
}
#undef __
static Isolate* GetIsolateFrom(LocalContext* context) {
return reinterpret_cast<Isolate*>((*context)->GetIsolate());
}
int32_t RunGeneratedCodeCallWrapper(ConvertDToIFunc func,
double from) {
#ifdef USE_SIMULATOR
return Simulator::current(CcTest::i_isolate())
->Call<int32_t>(FUNCTION_ADDR(func), from);
#else
return (*func)(from);
#endif
}
TEST(ConvertDToI) {
CcTest::InitializeVM();
LocalContext context;
Isolate* isolate = GetIsolateFrom(&context);
HandleScope scope(isolate);
#if DEBUG
// Verify that the tests actually work with the C version. In the release
// code, the compiler optimizes it away because it's all constant, but does it
// wrong, triggering an assert on gcc.
RunAllTruncationTests(&ConvertDToICVersion);
#endif
Register dest_registers[] = {x0, x1, x2, x3, x4, x5, x6, x7, x8, x9, x10, x11,
x12, x13, x14, x15, x18, x19, x20, x21, x22, x23,
x24};
for (size_t d = 0; d < sizeof(dest_registers) / sizeof(Register); d++) {
RunAllTruncationTests(
RunGeneratedCodeCallWrapper,
MakeConvertDToIFuncTrampoline(isolate, dest_registers[d]));
}
}
} // namespace internal
} // namespace v8
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